package card;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class CardDemo {
    private final String[] suits = {"♥","♠","♦","♣"};
    /**
     * 52张牌，没有大小王
     * J Q K
     * 11 12 13
     * @return
     */
    public List<Card> buyCard(){
        List<Card> cardList = new ArrayList<>();
        for (int i = 0; i < suits.length; i++) {
            for (int j = 1; j <= 13; j++) {
                Card card = new Card(suits[i],j);
                cardList.add(card);
                
            }
            
        }
        return cardList;
    }

    public void shuffle(List<Card> cardList){
        Random random =  new Random();
        for (int i = cardList.size()-1; i > 0  ; i--) {
            int index = random.nextInt(i);
            // index i 交换
            swap(cardList,i,index);


        }
    }

    private void swap(List<Card> cardList, int a, int b){
        Card tmp = cardList.get(a);
        cardList.set(a,cardList.get(b));
        cardList.set(b,tmp);
    }

    public void getCard(List<Card> cardList){
        List<List<Card>> hands = new ArrayList<>();
        List<Card> hand1 = new ArrayList<>();
        List<Card> hand2 = new ArrayList<>();
        List<Card> hand3 = new ArrayList<>();
        hands.add(hand1);
        hands.add(hand2);
        hands.add(hand3);
        // 3人 轮流抓 5张
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 3; j++) {
                Card card = cardList.remove(0);
                hands.get(j).add(card);
            }
        }
        System.out.println("第1个人揭牌如下：");
        System.out.println(hand1);
        System.out.println("第2个人揭牌如下：");
        System.out.println(hand2);
        System.out.println("第3个人揭牌如下：");
        System.out.println(hand3);
        System.out.println("剩下的牌：");
        System.out.println(cardList);


    }
}
